Elevator.



L.A.BRENEMAN.

ELEVATOR.

APPLICATION men was 3. me.

1,240,172. PatentedSept. 18,1917.

2 SHEETS-SHEET 2.

witnesses 2 11128711121" LOLZiS a. Breneznazz LOUIS A. EnENEMAN, OE'ST.PAUL, MINNESOTA, FACTURERS ASsocIATIoN, OF NORTH ST. :eAU

ELEVATOR.

- Application filed June 3,

the following is a specification.

My invention relates to improvements in elevators.

Elevators of the "type having endless traveling chainswith trays thereonadapted to automatically receive loads at various places.

' H of Fig.

and pointed connection wit Stations in their upward travel and dischargethe same at various stations in their downward travel are widely used inmercantile establishments and other These trays are carried by hangerspivotally attached to the drive chain, and are provided with a frame,designed to prevent the tilting of said hangers in their upward anddownward travel at the sides of the elevator. In crossing over from oneside to the other at the top of the elevator, ency to t'p if the loadsupon the trays are unbalanced, and my present invention has for itsprincipal object to provide, in an elevator of the class referred to,simple and efi'icient means to prevent the tilting of the tray hangersat the upper turn of the elevator. I

Other objects are secured by various novel features of construction andcombinations of parts which will be hereinafter described out in myclaims. 1

Figure 1 is a front view of my improved elevator, showing but one ofseveral tray hangers; Fig. 2 is a side view thereof; Fig. 3 is adiagrammatical view of the essential parts of my invention; Fig. 4 is asectional view taken on the line 3; and Fig. 5 is a detail secof a trayhanger, showing its a drive chain. Referring to the accompanyingdrawings, I have used the numeral 10, with various sufiixes, to indicatethe difi'erent parts of the elevator frame, which consists of inner andouter sets of channeled members oppositel arranged to provide ways forparts hereinafter described. The outer beams '10 form an elongatedinverted U-shaped structure, the top 10 being semicircular in form.Inner bars 10 are secured by straps 11 upon the beams 10; in spacedparallel relation In the drawings,

tional view Specification of Letters Patent.

said hangers have a tend-- 1916. Serial No. 101,495.

therewith (Fig. 1), similarly secured to as EATENT cation.

ASSIGNOR To MINNESOTA MANU- L, MINNESOTA, A CORPORATION OE FatentedSept. 18, 1917.

and a curved bar 10 is the curved beam 10".

A driving sprocket wheel 12 near the upper end of the frame is mountedupon a shaft 13 which is journaled in a bearing 14; on

a cross-piece 15, and said wheel turns within the frame and pa the endsof the bars 10 (Fig. 2).

17 near the bottom of the frame is furnished with a stub Shaft 18sprocket wheel sses through slots 16 in An idler which is journaled in abearing 19 on a cross-piece 20.

The drive chain 21 passes around said sprocket wheels 12 and 17 and theportions of the pass through W and bars 10.

which the sprocket driven through power pulley 22 or Tray hangerschainbetween said wheels ays between the beams 10 The drive shaft 13upon wheel 12 is mounted is suitable gearing from a by other suitablemeans. 23 carrying trays 24 are secured at intervals to the drive chain21. These hangers are identical and a description of one will sufiicefor all. 'A hangercomprises a hanger bar 25 having at Its rear side anintegral uide block 26, a boss 27 and ears 28 arranged respectively atthe upper end, middle and lower end of said hanger bar.

A gear segment 29 is cast integral wlth or otherwise secured to thelower end of said hanger bar which end is flattened out to-form a plate30 (Fig. 1)

overlapping said gear segment and pro- viding a segmental shoulder 31(Fig. '1) in 32, secured in the around said gear. A p

hanger bar 25 guide block 26, 1

and passing s provided with a reduced -end 32 which serves as tain linksin the chain- 21 and furnishes a connection between sai through the o alink pin for cerd hanger bar. and chain. The block 26 travels along theways between' the channeled. members of the frame, the curved face 33'flanges thereof and the (Fig. 1) bearing against against the frontcurved edges 34 the webs of sai d channeled members.

(Fig. 5) bearing A we guide wheel 35 Ournaled on a pmtle 35 in.

the holds said hanger b 10 and 10, the ways interrupted .boss 27 alsotravels in the ways and ar against tipping movements. Between the endsof the guide bars in which the wheels 35 and guide. blocks 26 trave areto permitthe. latter over the driving spro'c ide assage of the et 12.During such travel of the guide block 26, the guide wheel 35 passesthrou h the curved way at, 1 10 the top of the elevator. To supplementthe guide wheel 35 and to hold the hanger bar 25 in upright positionthroughout the upper turn ofthe elevator, I arrange a spur gear 36 belowthe driving sprocket 12 which meshes with the gear segment 29 on thehanger bar as it passes over said sprocket. Said spur gear 36 is mountedon a shaft 37 journaled in bearings 38 and said shaft is supplied with asprocket wheel 39 driven by a chain 10 from a sprocket wheel 41 on thedrive shaft 13. The are of the curved way has a radius equal to that ofthe sprocket wheel 12 and the spur gear 36 is turned at such speed withrespect to the travel of the chain 21 that the hanger bar 25 remains invertical position.

At the turn at the bottom of the elevator, no such provision need bemade to insure the upright position of the hanger bars for the reasonthat the trays in this situation are always empty and the hanger bars 25are retained in upright position by gravity.

Guard strips 42 are fixed upon the frame, as illustrated in Fig. 1, inpositions adjacent to the.path of the gear segments 29. These stripsbear against said gear segments and straighten the hanger bars if theyare out of plumb and insure the registration of the guide wheels 35 withthe openings of the different ways.

A load upon a tray being offset from the connection between the hangerbar-'25 and chain 21 would cause considerable stress upon the connectingpin 32, if the lower end of the hanger bar were not supported or braced.I provide such a support in a roller 43 (Fig. 4) which is revolublebetween the ears 28 and which rolls upon the frame members through thatpart of the path of said hanger where loads are carried, except incrossing from one side of the elevator to the other, and'while in thissituation the segmental shoulder 31 bears against the side of the spurgear 36 and braces the hanger bar.

Having described my invention, what I claim as new and desire to protectby Letters Patent, is:

1. In an elevator, a frame, a pair of sprocket wheels revoluble on saidframe and arranged one above the other, a chain passing over saidsprocket wheels, means to drive the chain, a hanger pivotally attachedto said chain, a tray on the lower end of the hanger, a gear segment onthe hanger, a driven spur gear below the upper sprocket wheel arrangedto mesh with said'gear segment and hold the hanger in upright positionat the upper turn, and a segmental shoulder on the hanger adapted toslidably bear against the side of said spur gear at said upper turn, tosupport the hanger.

2. In an elevator, a frame having vertical ways at its sides and anarched way at the top thereof, a pair of sprocket wheels revoluble on'said frame and arranged one above the other, a chain passing over saidsprocket wheels, means to drive the chain, a hanger pivotally attachedto said chain, a tray .on the lower end of the hanger, a guide wheel onthe hanger, above the point of connection with the chain, arranged totravel in said ways, a gear segment on the hanger beneath said point ofconnection, a driven spur gear below the upper sprocket wheel, said gearsegment and guide wheel being adapted to cooperate respectively withsaid spur gear' and arched way to hold the hanger in upright position atthe upper turn of the elevator, and a segmental shoulder at the outeredge of said gear segment designed to slidably bear against the rim ofsaid spur gear and brace the hanger at'said upper turn.

3. In an elevator, a frame having vertical ways at its sides and anarched way at the top thereof, a pair of sprocket wheels revoluble onsaid frame and arranged one above the other, a chain passing over saidsprocket wheels, means to drive the chain, a hanger having an integralguide block thereon adapted to travel in said vertical ways, a pivotpassing centrally through said guide block and connected with saidchain, a tray LOUIS A. BRENEMAN.

